// "use strict";
let user = {
  name: "后盾人",
  age: 14
};
Object.freeze(user);
console.log(JSON.stringify(Object.getOwnPropertyDescriptors(user), null, 2));

user.site = "houdunren.com";
delete user.name;
user.name = "向边";

console.log(Object.isFrozen(user));
console.log(user.name);
for (const [key, value] of Object.entries(user)) {
  console.log(key, value);
}
